Synthesis, spectral and antimicrobial studies of NiII and CuII complexes with a nitrogen donor new azamacrocyclic ligand with pendent arms

Abstract

The complexes of Ni II and Cu II were synthesized with the new azamacrocyclic ligand. The ligand [1,5,8,12-tetraaza-3,10-diethyl-2,4,9,11-tetramethyl-6(7),13(14)-di(bromopyridine)] was prepared by the reaction of 3-ethyl-2,4-pentadione and 5-bromo-2,6-diaminopyridine. All the complexes have been found to have general composition [M(L)X 2 ] [where M = Ni II and Cu II and X = Cl - , NO 3 - , 1/2SO 4 2- ]. All the complexes are characterized by the conductance measurements, magnetic susceptibility measurements, mass, IR and electronic spectral studies. An octahedral geometry was assigned for Ni II complexes and tetragonal for Cu II complexes. The biological actions of the ligand and complexes have been screened in vitro against different pathogenic fungi and several bacteria to study their comparative capacity to inhibit the growth.